Determining a risk/reward model for a service provided by a service provider to a serviced entity where a value function for the service is dependent on at least value parameter, and comprises provision of a serviced entity base case being characteristic for at least one serviced entity value parameter without provision of a service and provision of a set of projects and their interdependencies being eligible for providing the service, each project having a given impact on a subset of one or both of the at least one serviced entity value parameter and at least one service provider value parameter. The risk/reward model is determined by way of performing a selection of the sets of projects resulting in a selection, further the model provides a risk/reward line, the risk/reward line is characteristic for whether a reward or a penalty is accredited to the service provider depending on achieved results.